ddi_strtoll(9F) 					   Kernel Functions for Drivers 					   ddi_strtoll(9F)

NAME

       ddi_strtoll, ddi_strtoull - string conversion functions

SYNOPSIS

       #include <sys/ddi.h>
       #include <sys/sunddi.h>

       int ddi_strtoll(const char *str, char **endptr, int base,
	    longlong_t *result);

       int ddi_strtoull(const char *str, char **endptr, int base,
	    u_longlong_t *result);

PARAMETERS

       str	 pointer to a character string to be converted

       endptr	 post-conversion final string of unrecognized characters

       base	 radix used for conversion

       result	 pointer to variable which contains the converted value

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI)

DESCRIPTION

       The  ddi_strtoll() function converts the initial portion of the string pointed to by str to a type longlong_t representation and stores the
       converted value in result.

       The ddi_strtoull() function converts the initial portion of the string pointed to by str to a type u_longlong_t representation  and  stores
       the converted value in result.

       These functions first decomposes the input string into three parts:

	   1.	  An initial (possibly empty) sequence of white-space characters (" ", "	", "
", "
", "f")

	   2.	  A subject sequence interpreted as an integer represented in some radix determined by the value of base

	   3.	  A final string of one or more unrecognized characters, including the terminating null byte of the input string.

       The  ddi_strtoll() function then attempts to convert the subject sequence to an integer and returns the result. The ddi_strtoull() function
       attempts to convert the subject sequence to an unsigned integer and returns the result.

       If the value of base is 0, the expected form of the subject sequence is that of a decimal constant, octal constant or hexadecimal constant,
       any  of	which  may  be	preceded  by  a plus ("+") or minus ("-") sign. A decimal constant begins with a non-zero digit, and consists of a
       sequence of decimal digits. An octal constant consists of the prefix 0 optionally followed by a sequence of the digits 0 to 7 only. A hexa-
       decimal	constant consists of the prefix 0x or 0X followed by a sequence of the decimal digits and letters a (or A) to f (or F) with values
       10 to 15 respectively.

       If the value of base is between 2 and 36, the expected form of the subject sequence is a sequence of letters  and  digits  representing	an
       integer	with the radix specified by base, optionally preceded by a plus or minus sign. The letters from a (or A) to z (or Z) inclusive are
       ascribed the values 10 to 35 and only letters whose ascribed values are less than that of base are permitted. If the value of base  is  16,
       the characters 0x or 0X may optionally precede the sequence of letters and digits, following the sign if present.

       The  subject  sequence is defined as the longest initial subsequence of the input string, starting with the first non-white-space character
       that is of the expected form. The subject sequence contains no characters if the input string is empty or consists entirely of  white-space
       characters, or if the first non-white-space character is other than a sign or a permissible letter or digit.

       If  the	subject  sequence  has	the  expected form and the value of base is 0, the sequence of characters starting with the first digit is
       interpreted as an integer constant. If the subject sequence has the expected form and the value of base is between 2 and 36, it is used	as
       the  base  for  conversion,  ascribing to each letter its value as given above. If the subject sequence begins with a minus sign, the value
       resulting from the conversion is negated. A pointer to the final string is stored in the object pointed to by endptr, provided that  endptr
       is not a null pointer.

       If  the	subject  sequence  is  empty  or does not have the expected form, no conversion is performed and the value of str is stored in the
       object pointed to by endptr, provided that endptr is not a null pointer.

RETURN VALUES

       Upon successful completion, these functions return 0 and store the converted value in result. If no  conversion	is  performed  due  to	an
       invalid base, these functions return EINVAL and the variable pointed by result is not changed.

CONTEXT

       These functions may be called from user, kernel or interrupt context.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       Writing Device Drivers

SunOS 5.11							    25 Feb 2009 						   ddi_strtoll(9F)